No O2 data in Vitals for Apple Watch Series 11 and iPhone 16 Pro

Hello, I have Watch Series 11 and iPhone 16 Pro.


Health app is not tracking my O2 in Vitals during sleep, I have empty column and message No Data for O2 in Vitals.


I can see O2 measurements in Respiratory tab of Health app but they are not synced with Vitals.


I have the newest iOS and watchOS.



[Re-Titled by Moderator]

Original Title: Blood oxygen in Vitals

Apple Watch Series 11, watchOS 26

Posted on Nov 5, 2025 2:07 AM

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3 replies

No O2 data in Vitals for Apple Watch Series 11 and iPhone 16 Pro

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